Oceans & space publications
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Coordinated Ionospheric Observations Indicating Coupling between Preonset Flow Bursts and Waves That Lead to Substorm Onset
A critical, long-standing problem in substorm research is identification of the sequence of events leading to substorm expansion phase onset.
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Experimental Demonstration of a Broadband All-Dielectric Metamaterial Perfect Reflector
Here we present the demonstration of a single-negative all-dielectric metamaterial that possesses peak reflectance over 99% and an average reflectance over 98% across a 200 nm wide bandwidth in the short-wavelength…
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Incoherent Scatter Radar-FAST Satellite Common Volume Observations of Upflow-to-Outflow Conversion
Measurements have been combined with all-sky images, polar convection measurements, and FAST particle and field measurements to quantify the contribution of different magnetosphere-ionosphere coupling processes to the extraction efficiency of…
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Fabrication of Highly Spin-Polarized Co2FeAl0.5Si0.5 Thin-Films
Ferromagnetic Heusler Co2FeAl0.5Si0.5 epitaxial thin-films have been fabricated in the L21 structure with saturation magnetizations over 1200 emu/cm3.
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Generalized Effective-Medium Theory for Metamaterials
We present an effective-medium model for calculating the frequency-dependent effective permittivity ε(ω) and permeability μ(ω) of metamaterial composites containing spherical particles with arbitrary permittivity and permeability.
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Auroral Ionospheric F Region Density Cavity Formation and Evolution: Mica Campaign Results
Auroral ionospheric F region density depletions observed by PFISR (Poker Flat Incoherent Scatter Radar) during the MICA (Magnetosphere-Ionosphere Coupling in the Alfvén Resonator) sounding rocket campaign are critically examined alongside complementary numerical…
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Characteristics of Large-Scale Wave Structure Observed from African and Southeast Asian Longitudinal Sectors
In this scenario, a comprehensive study is carried out, for the first time, on the spatial and temporal characteristics of LSWS observed in spatial domain over African and Southeast Asian…
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Ionospheric Ion Temperature Forecasting in Multiples of 27 Days
In this study we demonstrate that over a 3 year period, ionospheric variability observed from Poker Flat, Alaska, has, in fact, a high degree of long-term predictability.
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Distributed Coverage with Mobile Robots on a Graph: Locational Optimization and Equal-Mass Partitioning
This paper presents decentralized algorithms for coverage with mobile robots on a graph. We use distributed vertex substitution for locational optimization and equal mass partitioning, and the controllers minimize the…
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Comparison of MODIS 3 Km and 10 Km Resolution Aerosol Optical Depth Retrievals over Land with Airborne Sunphotometer Measurements During Arctas Summer 2008
In this paper we compare MODIS and AATS AOD at 553 nm in 58 10 km and 134 3 km retrieval grid cells.
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F Region Dusk Ion Temperature Spikes at the Equatorward Edge of the High-Latitude Convection Pattern
Using Poker Flat Incoherent Scatter Radar data from the International Polar Year, we observed unexpected short-lived enhancements of a few 100 K in the F region ion temperature, or “Ti spikes”, in conjunction with…
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Empirical Model of Poynting Flux Derived from Fast Data and a Cusp Signature
Empirical models of the Poynting flux and particle kinetic energy flux, associated with auroral processes, have been constructed using data from the FAST satellite and are available online.